mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, glassy-to-dull luster, irregular fracture, and no obvious cleavage; Mohs hardness 7, with a trigonal crystal structure. The image shows a small rough piece, so identification is tentative.
Identified More mineral →
Explore Milky quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
White to translucent, glassy-to-dull luster, irregular fracture, and no obvious cleavage; Mohs hardness 7, with a trigonal crystal structure. The image shows a small rough piece, so identification is tentative.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. Quartz is found in rocks of many geological ages.
Uses & applications
Used in glass and ceramics, electronics, construction aggregate, and occasionally carvings or inexpensive jewelry.
Geological facts
Quartz is one of Earth’s most abundant minerals; its hardness lets it scratch ordinary glass.
Field identification & locations
Look for hardness near 7, glassy fracture surfaces, and lack of cleavage. Common worldwide in veins, pegmatites, and many rock types.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary